Double-action gauge



1949 s. J. ROBINS DOUBLE-ACTION GAUGE Filed Nov. 14, 1945 INVENTOR. I

I H J Patented Dec. 27, 1949 UNITED S'TA'TES PAT- EN (9F F 1 CE DOUBLE-ACTION GAUGE Stanley J. Robins, New York, N. Y. Application November 14, 1945, Serial No. 628,399

1 Claim.

This invention relates to gauges and more especially to devices for testing longitudinal dimensions of workpieces.

It is an object of this invention to provide a device of the kind aforesaid which is organized to test two dimensions of a workpiece on correct length in one and the same operation.

I will now describe more in detail the nature of this invention and the best manner in which it can be performed, having reference to the drawings annexed to this specification and forming part thereof, in which an embodiment of the invention is illustrated diagrammatically by way of example.

In the drawings Fig. 1 is an axial section, while Fig. 2 is an end view.

Fig. 3 is a plan view and Fig. 4 is a section of a workpiece to be tested.

Referring to the drawings, I is a block or body and 2 and 3 are two bearings aligned coaxially in spaced relation on the ends of said block.

6 is a sleeve mounted in bearing 2 for axial displacement, like a tubular plunger, relative to the body I against the action of a return spring I held in another bore 8 of the body between a stopper 9 and a piston I projecting from the bore 8 into a cavity II of the body and abutting against a driver I2 which extends vertically into said cavity and is fixed to the sleeve 6 by its top end. The outwardly projecting end of sleeve 6 is formed with a collar I3 limiting its inward movement.

I4 is a plunger axially displaceable in the bore I5 of sleeve 6 against the action of a return spring I6 abutting against a perforated stopper H, in which is mounted a dial indicator gauge I8 which is thus fixed to and forms part of the sleeve 6. Another dial indicator gauge I9 is arranged in alignment with gauge I8 in the bearing 3 and is thus held immovably in the body I. 2| is the spindle of gauge I8; it extends through diametrically opposed holes in the dial casing and its farther end (on the left in the drawing) is spaced a predetermined distance from the end of the spindle 22 of the other gauge I9. The other end of spindle 2I is spaced a predetermined distance from the inner end of the plunger I4.

With the parts arranged as above described, it is clear that pressure exerted in axial direction on the plunger I4 will cause its inner end to contact, and exert pressure on, the spindle H of the dial indicator gauge I8 which is fixed to the tubular plunger or sleeve 6. When spindle 2I is thus forced toward the left in the drawing, the hand on the dial of gauge I8 will be deflected. If now pressure in axial direction is exerted also on the tubular plunger 6, without the pressure on plunger I4 being released, the gauge I8 will be moved bodily towards the left in the drawing and the free end of its spindle 2| will contact, and exert pressure on, the spindle 22 of the gauge I9 which is immovably fixed in the block I. This spindle, on being shifted axially relative to the gauge body, will cause the hand on the dial of this gauge to be deflected. Thus pressure exerted consecutively on the projecting ends of plunger I4 and tubular plunger 6 will cause consecutive deflection of the hands of both gauges.

As shown in dotted lines in Fig. 1, a work piece 30 such as shown in Fig. 4 can be tested by means of this device in a single operation as to correct axial dimension of the inner recess 24 and the outer recess 25 and their total depth B. When a workpiece 30 is placed on the projecting end of the tubular plunger 6 and forced by hand toward the left in the drawing, its bottom 3I after contacting the plunger I4 will shift it towards the spindle 2| of the first gauge I8 and cause deflection of its hand. The movement of the workpiece is limited by the end face 32 of the tubular plunger 6 when the annular bottom face 33 of the workpiece contacts the end face 32. The defiection of the hand of gauge I8 will indicate whether the depth A of the inner recess 24 is correct. Continuing pressure on the workpiece will then cause the annular bottom face 33 to force the tubular plunger 6 toward the left in the drawing, whereby the gauge I8 and its spindle 2| are shifted towards spindle 22 of gauge I9, until the annular top face 34 of the workpiece meets the end face 35 of the block I. Deflection of the hand of gauge I9 shows whether total depth B is correct.

Instead of measuring the dimension B, I may also measure the dimension C (Fig. 4) by fixing a cap 4| (Fig. 3) to the gauge body I8 facing the end of spindle 22 of gauge I9. This cap is not influenced by the spindle 2|. When the gauge body I8 is displaced together with the sleeve 6, the dial of gauge I9 will register the length C of this displacement relative to the instrument body I, when the cap 4| contacts the spindle 22.

I wish it to be understood that I do not desire to be limited to the details of construction shown in the drawing and described in the specification, for obvious modifications will occur to a person skilled in the art.

I claim:

A gauge device comprising in combination, two dial indicator gauges mounted with their spindles in axial alignment, one of said gauges being 3 supported for axial movement relative to the REFERENCES CITED end and Contact with the spindle of the The following references are of record in the other gauge, an axially movable tubular plunger I supporting the movable gauge and another me of this patent plunger being arranged for reciprocation within 5 UNITED STATES PATENTS said tubular plunger in alignment with the spin- Number Name Date dle of the other gauge and in operative relation 1 579 900 Trimbath Apr. 6 1926 the Spindle of the mwable gauge 2:081:738 Cononer 11:11:: May 25, 1937 2,202,638 Praeg May 28, 1940 STANLEY J. ROBINS. 

